"This report surfaces what the Technical Working Group identified as the chief barriers to an optimal global response to online child sexual abuse material (CSAM) within three sectors: law enforcement, industry and government. The barriers identified are explained in detail in the report, and specific recommendations made for each sector. Recommendations are also provided for joint action. Two overarching themes have also emerged. First, the need for greater standardisation of process, practice and policies; second, the need for greater collaboration, coordination and inter-operability across stakeholders and functions, nations and jurisdictions." (Executive summary)